1  // Specific definitions for VxWorks  -*- C++ -*-
       2  
       3  // Copyright (C) 2000-2023 Free Software Foundation, Inc.
       4  //
       5  // This file is part of the GNU ISO C++ Library.  This library is free
       6  // software; you can redistribute it and/or modify it under the
       7  // terms of the GNU General Public License as published by the
       8  // Free Software Foundation; either version 3, or (at your option)
       9  // any later version.
      10  
      11  // This library is distributed in the hope that it will be useful,
      12  // but WITHOUT ANY WARRANTY; without even the implied warranty of
      13  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14  // GNU General Public License for more details.
      15  
      16  // Under Section 7 of GPL version 3, you are granted additional
      17  // permissions described in the GCC Runtime Library Exception, version
      18  // 3.1, as published by the Free Software Foundation.
      19  
      20  // You should have received a copy of the GNU General Public License and
      21  // a copy of the GCC Runtime Library Exception along with this program;
      22  // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      23  // <http://www.gnu.org/licenses/>.
      24  
      25  /** @file bits/os_defines.h
      26   *  This is an internal header file, included by other library headers.
      27   *  Do not attempt to use it directly. @headername{iosfwd}
      28   */
      29  
      30  #ifndef _GLIBCXX_OS_DEFINES
      31  #define _GLIBCXX_OS_DEFINES 1
      32  
      33  // System-specific #define, typedefs, corrections, etc, go here.  This
      34  // file will come before all others.
      35  
      36  // The system environment we can rely on varies across VxWorks
      37  // versions.
      38  #include <_vxworks-versions.h>
      39  
      40  // Weak refs are supported starting with VxWorks 7, in RTP mode only
      41  
      42  #if _VXWORKS_MAJOR_GE(7) && defined(__RTP__)
      43  #define _GLIBCXX_USE_WEAK_REF 1
      44  #else
      45  #define _GLIBCXX_USE_WEAK_REF 0
      46  #endif
      47  
      48  // We support TLS on VxWorks >= 6.6 (either directly or with emutls)
      49  #if !_VXWORKS_PRE(6, 6)
      50  #define _GLIBCXX_HAVE_TLS 1
      51  #endif
      52  
      53  // VxWorks7 comes with a DinkumWare library and the system headers which we
      54  // are going to include for libstdc++ have a few related intrinsic
      55  // assumptions.  We control our own configuration here to best integrate with
      56  // this environment: use C99 math headers, do not use the FP macros for
      57  // dynamic cast by default (overriden for RTPs below) and arrange to disable
      58  // the system TR1 declarations as we'll provide ours.
      59  
      60  #if _VXWORKS_MAJOR_GE(7)
      61  
      62  #define _GLIBCXX_USE_C99_MATH 1
      63  #define _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC 0
      64  
      65  #undef _HAS_TR1_DECLARATIONS
      66  #define _HAS_TR1_DECLARATIONS 0
      67  
      68  #else  // VXWORKS_MAJOR < 7
      69  
      70  // For RTPs, use the VxWorks headers as a basis, from which we can use
      71  // C99 dynamic FP macros and expect (after fixincludes) accurate c++11
      72  // prototypes for FP.
      73  
      74  #ifdef __RTP__
      75  
      76  #define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 1
      77  
      78  #undef _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC
      79  #define _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC 1
      80  
      81  #define __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
      82  
      83  #else // !__RTP__
      84  
      85  // libstdc++ will include system headers and vxWorks.h ought to have
      86  // been included ahead for VxWorks kernel modules prior to VxWorks 7
      87  #include <vxWorks.h>
      88  
      89  #endif // __RTP__
      90  
      91  #endif // _VXWORKS_MAJOR >= 7
      92  
      93  // The min/max "functions" may be refered to with a namespace prefix.
      94  // Prevent possible redefinitions as macros from VxWorks headers.
      95  #undef NOMINMAX
      96  #define NOMINMAX 1
      97  
      98  // Do not include the inline definitions from VxWorks headers, as we'll
      99  // want to use the ones from libstdc++ instead.
     100  #undef _NO_CPP_INLINES
     101  #define _NO_CPP_INLINES 1
     102  
     103  #endif // _GLIBCXX_OS_DEFINES